As far as financial trading software, VPS solutions may be very effective if properly set up, but what it comes down to includes much more than just the name. You should search for durable up-time, high-quality servers, NVMe SSD drives, and near-market network routes.
On the-security front, the VPS provider must be able to offer encryption capabilities, firewall setup, and DDoS protection, regular patching mechanisms, access logging, and data isolation.